Electric traction-elevator.



No. 816,806. PATENTBD APR. 3, 1986K A. MGNUSN. ELECTRIC TRAGTONELEVATOR.

APPLGATGl FILE) HOY, 17,

2 SHEETS-SHEET 1.

WITNESSES:

MW/fm.; a"

ATTORNY No. 816,806. PATENTES R. 3, L903.

MAGNUSGN. ELECTRIC TEACTIN ELBVATOR.

APPLIG'l YILED X0?. 17, 1905.

2 SHEETS-"SHEET Z.

f www? WITNESSES:

TTRNE? the function of which is to automatically more a contact 01 overa set of stationary contacts 92 and to thereby short-circuit an.opposition element 28, which is shown as a de tia-connected resistanceconnected in the rotor-circuit of the motor and to the contacts 01 '02.This movement may be accomplished in many ways*t"or example', by anelectromagnet 93 attracting its core 95 when to its windinfy 94 isenergized. The core 95 may be normally held in raised position by meansof a spring 96.

100 designates a source of alternating-current supply, which afterpassing through a transformer 101 and a main-line switch 102 passes tovarious parts of the apparatus, as will be pointed out in thedescription of the operation of the invention.

The magnetic Sheave (shown in Figs. 3 and zo 4) is constructed of twoside pieces 31 and 32 of magnetic material, such as iron. These are ofsimilar construction and may be secured together by means of bolts 33.The completed structure is preferably in the form z5 of 'a sheave orpulley having rims 34 34 and grooves 35 on its outer periphery. It maybe seen from the right-hand portion of Fig. 4 that these grooves areupon projections which are alternately upon side 31 and 3o upon side3:2. For example, the portions 35A and 35B are integral parts of theside portion 32, while the portion 35C is an integral part of the side31. Directly back of each of these portions is a circular lug, such as35 that shown at 35 in Figs. 3 and 4. Around each of these lugs isplaced a Winding 36, and these windings may be connected by conductors36 and 36B to collector-rings 37 and 3S on one side of the sheave 30.Brushes 4o 37A and 38A may be arranged to bear upon thesecollector-rings. These brushes may be supported by an arm or bracket 39,which is attached to aportion of motor 20. A manually-operated switch 16is shown in the elevator-car 10. It comprises a pivoted lever 17 and twostationary contacts 18 and 19.

A conductor 103A is connected tothe mainline conductor 103 `and to thepivoted lever 17. Now if an operator moves pivoted le- 5o ver 17 so thatit comes in contact with stationary conta-ct 18 a circuit is closedthereby from main-line conductor 103 through conductor 103, switch 16,conductor 18^ to and through magnet-winding 73 and conductor 104A tomain-line conductor 104. The Circuit which is thus completed willconnect magnet-winding 73 across two of the mainline conductors, and itwill `be energized thereby. It will then raise core 7'2 and its 6oconnected parts, so that movable contacts 74 and 75 will be clcsedagainst the stationary contacts 76 and 77, respectively, and theswitch-arm S5 will be moved oil ot' stationary contact 30 and ontostationary contact SS. Aain-line conductor 103 will thus be closed tomotor-terminal 22 through contacts 76 and 74 and conductor 22". Thecentral main-line conductor 104 is perinanentl connected to the centralmotor-termina 23. Main-line conductor 105 will be connected throughcontacts 'iand 75 and conductor 24-jk to the other motor-terminal 24.Winding 55 is connected to motor-terminals 22 and 23, sothat when themotcr rcceives current from the line brake-magnet .33 will be energizedand will attract its core, and thereby draw brake-shoe 51 away from thebrake-pulley 50 against the compression ol' spring 52. After thereversing-switch A has been operated in the manner just described themotor will receive current from the source of supply 100, the brake 5051 will be released, and the motor will begin to rotate in onedirection. At the same time generator 40 will' rotate in the samedirection and it will generate .a current proportional in strength tothe speed of the motor 20. When it rotates in one direction-for example,to the left-the friction of its brushes 43 44 upon comn'iutator 40A willcause them and the yoke 42, which supports them, to move over to theleft until they strike a ainst stop 43". If the generator rotates' intie opposite direction, it will carry brushes 43 44 and the yoke 42,which su ports them, in the opposite direction until)the yoke strikesagainst stop-piece 44, In this manner the current enerated by thegenerator 40 will always low through its series ield 45 and theconductors 43 and 44B, which are connected to it in thesame"`direetioi1, regardless of the direction of rotation of thegenerator.

The current from generator 40 will be led through conductors 43E and 44Bto various parts of the apparatus, as I will now point out. Theconductor 43B is connected to the brush 38 of magnetic sheave 30 bymeans cf a conductor 38B. A circuit is completed through the variouswindings 36 of this` magnetic sheave out through brush 37 and throughconductor 37H back to the other lead 44B from generator 40. The circuitthrough windings 36 is arranged to pass around one of said windings inone direction and through the next of'said windings in the oppositedirection, and so on, so that the various scctions which thesecoils-excite will bc encrgized with opposite polarities. It may be seen,therefore, that the current generated by generator 40 will energize themagnetic sheave 30, so that thc latter will have a nnignetic attractionfor the rope or cable 11,

which passes over its magnetically-polarized sections. Another circuitfrom generator' 40 'passes through conductor 43" tothe lower end oftnagnet-winding 9-1; thence through conductor 01^ to the stationarycontat-ts h and S7. Switch-arm S5 is now restingr upon `stationarycontact Si". and a circuit is closed thereby through conductor 35" toconductor ICO v48 will thus be energizedi bg aPP y 44B, and thence backto generator 40. Consequently the current passing through magnet-winding94 will energiric ma'Q'net 93 and cause the latter to move the sli inContact 94 over stationary contacts 92 an( to thusv` short-circuit theresistance 28, which is connected in the roller circuit by motor 2Gthrough slip-rings 25, 26, and 27. The magnet 93 may be arranged to morecontact 91 an amount proportional to the voltage generated by generator40, which, as has been shown, is proportional to the speed of motor 20,This has already been described fully in my prior ap lication beforereferred to, and hereforewil not be more fully described ere. i

As the rope or cable 11 is driven b magnetic sheaves 30, it is evidentthat asft e motor 20 rotates its motion will be imparted through rope orcable 11' to the elevatorcar 10.

When it is desired to stop motor 20l and elevator-car 10, the operatormay bring bachYY the lever 17 of switch 16 to ita central tion, when themagnet 70 will become Y ergized and will allow the movable contacts 74and 75,130 drop away from the stationary contacts 7 6 and 77. Thecurrent Wi'llthe'refore be cut off the motor 2) and from brake' magnet53. The brakcwhoe 51 will thin-'e-n fore be ap lied by spring 52 tobrake-pulley and' cause the motor and thecar to come to rest. At thesame time contactarm'85 will be moved onto etetireneQ Acontact' 86 and acircuit will be coseti erely from generator 4f) through condctor' andconductor 43 to the lower end'of'tngi, net-'winding 49, throughconductor 49, :stationarycontact S6, switch-arm 85, conductors 85* and44B, back to generator 4G. Magnet the cnn-ent of enerator 40 and wilrake-shoe 47 to rake-.pulle 46 with a pressure proportional to the specof the motor 20. If the operator had moved opposite-direction, so thatit carne in contact with stationary contact 19, magnet 69 would havebeen energized and would have raised its core 62.and closed thecontactswhich it controls. The main-line current would have then beenAclosed to motor 20 in the opposite direction and its rotation wouldhave been op osite to that reviously described.

t is evident that the reversing-switch may be manually operated by meansof the handle 84;' but the operation of the various parts would be inthisfcase similar to that above described.

While .I have shown one form of motorcontrollng systems in combinationwith my present-invention, it is a plicable aswell to many other -ormsof e crater-controllers, and 'I therefore do not limit myself tothespecific system herein shown and described." "I have shownumy magneticsheave 30 coneheave and the lever 17 of switch 16 in the' sheave and thecar, and a generator connected to run with the motor and conneeted'tothe Winding. a i

3. An electric 'motor, a magnetic eheave arranged to be driven thereby,said sheave A comprisin sections along its peri her arranged toVc'alternately magnetize wit o posite polarties, a. car,` a cableconnecting t e the car, anda generator connect ed to run with the motorand arranged to energize the sheave.

i" '4. An electric motor, a magnetic sheazve Yarranged to be driventhereby, said sheave having two side pieces, each of which forms a rimand carries upon it alternatel -project- 'ing portions which for-mitsper-ipY ery, saidV portiol being arranged to be alternately 'magnetizedwith o pcste polar-ities, a car, a cable connecting tlie' ehearfel andthe car, and a generator connected-to 'run with the motor .and arrangedto ener izo the sheave.

An electric moo'r, a magnetic sheave arranged to bedriren thereby, saidsheavel 'havingltwo side pieces, each of which forms a rim and carries'u' on it alternately-projecting portions which gorro its periphery,awinding for each of said portions, a car, a. cable connecting thesheave andthe car, and a generator connected to run with the motor-andarranged to energize thclsheave. i'

6. An alternating-current motor, a magnetc'sheave arranged to be driventhereby, a 'carga cable connecting the sheave and the car, and adirect-current generator connected to run withithe motor and arranged toenergize theehcev.. 7.An alternating-current motor, a startin-vtchtherefor, a magnetic sheave arranged to be driven therebv, a ear. acable connecting the sheave and t e car, and a direct-current generatorconnected to run with the motorv andar-ranged to energize the sheave. i

8. An alternating-current motor, a reversing-swtch'for the motor, amagnetic shcave arranged to be driven thereby, a car, a cable connectingthe sheave and the car, and a'direct-current generator connected to runwith the motor 'and arranged to energize the Ysheave.

YAn alternating-current motor, an electrically-actuated reversing-switchfor the motor, a magnetiosheave arranged to be driven roo therein'. ncan a cable cannet-ling the `s'heave and the ear. and a direct-currentgenerator connected to rnn with the ntntor and ar ranged lo enetgiz't`the aheave.

itl. \n alternating-current motor, an eleclVieillir-actttatedrevetzsing-switeh therefor. a :n.ignetitl l"heave arranged to heoriventhereh v. a ear. a cable connecting the `sheave and the ear. adirectcurrent generator connected to rnn with the niotor and arranged toenergize the sheave. and meansl for operating the reversing-switeli fromthe car.

1]. Analternating-current motor, a brake for the inotor. a niagnetie`sheave arranged to be driven by the niotor. a ear. a cable connectingthe sheave and the car. and a directeurrent generator connected to runwith the motor and arranged to energize the slieave 1j). Analternating-current motor. an electrirallv-aetnated reversing-switchtherefor, an electideally-actuated brake for the motor, a niagneticsheave arranged to be driven by the inotor, a ear, a cable connectingthe sheave and the car, a direct-current generator connected to run withthe motor and arranged to energize the sheave and lneans for o `ieratingthe reversing-switch and the brake roni the car.

' 13. An alternating-current motor, a magnetic sheave arranged to bedriven thereby, a ear` a cable connecting the car and the sheave, adirect-cnrrent generator connected to run with the motor and arranged togenerate a voltage proportional in .strength to the speed of the motor,said voltage being arranged to energize the shcave.

14. An alternating-current motor, a niagnetic sheave arranged to bedriven thereby. an opposition element in the motor-circuit, a ear. acable connecting the car and the sheavc, a direct-current.generatorconnected to run with the motor and arranged to generate a volt ageproportional in strength to the speed ,f the motor, said voltagearranged to energize the sheave, and means actuated by said variablevoltage for automatically cutting the opposition element out of themotor-circuit.

15. An alternating-current motor, a magnetic sheave arranged to bedriven thereby, an opposition element in the motor-c1rcu1t,a car.

. a cable connecting the car and the slieave, a

direct-current generator connected to run with the motor and arranged togenerate a voltage proportional in strength to the speed of the motor. abrake applied b v the variable voltage in stopping.- -Said voltage beingarranged to energize the lheave` and ineans actuated b v said variablevoltage for autoxnaticallv cutting the opposition eletncnt ont of thexnotor-eircnit.

Hi. An eleetriel niotor, a magnetic shcave arranged to be driventhereby. a car, a cable nl' magnetic material connecting the sheave andthe ear and a generator connected to run with the motor and arranged toenergize the sheave.

17o An electri(I niotor. a magnetic sheave arranged to lie-driventhereby, a car, a countet'weight, a eahle of magnetic material runningon the sheave and connecting the car and the eounterweight and agenerator con-` nected to rnn with the motor and arranged to energizethe sheave.

1S. An alternating-cnrrent motor, a inagnetic `aheave arranged to hedriven thereby, a reversing-switch for the mot-or, an opposition elementin the inciter-circuit, a car, a cable connecting the ear and thesheave, a direct -current generator connected to run with the motor andarranged to generate a voltage proportional in strength to the speed ofthe motor, said voltage arranged to energize the sheave, and anelectroresponsive device actuated by said variable voltage forautomatically cutting the opposition element out of the motor-circuit.

'19. An alternating-current motor, a mag-A' netio sheave arranged to bedriven thereby, an electrically-actuated reversing-switch for the motor,an electrically-actuated brake for the niotor, an opposition element inthe Inotor-circnit, a car, a cable connecting the car and the' sheave, adirect-current generator connected to run with the motor and arranged togenerate a voltage proportional in strength to the speed of the motor,said voltage arranged to energize the sheave, an electroresponsivedevice actuated b v said variable voltage for automatically cutting theopposition element out of the motor-circuit and manually-operatedcircuit-closer for operating the reversing-switch and the brake.

20. An alternating-current motor, a magnetic sheave arranged to bedriven thereby, an electrically-actuated reversing-switch for the motor,an electrically-actuated brake. ar

vice actuated by said variable voltage for au-V tomatically cutting theop osition element out of the motor-circuit an a car-switch arranged tocontrol the movement of the motor.

21. A motor, a magnetic sheave arranged to be driven thereby, a car, acable connecting the sheave and the car, and a generator connected torun with the motor and arranged to energize the sheave.

"9 A motor, a magnetic sheave arranged IOO IOS

IIO

amasar B to be driven therebyrsgid sheve com rising;s terweivht and agneraor connected Ato run sections' alpnits periphery arrange" .to be gwith t a motor and arranged to energizuthe alternately maggntized Wlthopposite p0 sheave.

larties, a, carfa, cable connecting the shcave l In 'testimony whereof Ihave signed my IKS Vand the car, and a, generator connected to Rm nameto this specification in the. presence of with the motc'g'und arrangedto energize the two subscribing-witnesses- *hemf AXEL MAGNUSON.

23. A motor, a, magnetic sheave arranged i to be driven thereby, a, car,a. counterweight, Witnesses: a cabe of magpetic material running overthe JOSEPH E. CAVANAUGH, 1 ERNEST W. MARSHALL.

shear@ and comc'tng the car sind the court

